THE EXPERIMENTAL STUDY ON ARTIFICIAL REPRODUCTION OF KETELEERIA TREE SPECIES DIVISION OF SUITABLE AREA FOR GROWING WATTLE, ACACIA MEARNSII, AND KEY POINTS OF PLANTING TECHNIQUE IN EACH AREA Technical Measures for Cultivation of Water and Soil Conservation Forest in Yuanmao Dry-hot River Valley in Yunnan Province and Its Preliminary Result Study on elevated-temperature planting technique in sweet and glutinous corn Quantitative analysis on the effect of planting techniques on the quality of apple-shaped pear